<template>
  <div class="top-header-sticky" :class="{ show: y >= 108 }">
    <div class="container" v-show="y > 108">
      <RouterLink class="logo" to="/" />
      <TopHeaderContent />
      <div class="right">
        <RouterLink to="/">品牌</RouterLink>
        <RouterLink to="/">专题</RouterLink>
      </div>
    </div>
  </div>
</template>

<script>
  // import { ref } from "vue";
  // import { onMounted } from "@vue/runtime-core";
  import {
    useWindowScroll
  } from '@vueuse/core'
  import TopHeaderContent from "../common/TopHeaderContent.vue";
  export default {
    name: "TopHeaderSticky",
    components: {
      TopHeaderContent
    },
    setup() {
      //原生
      // const y = ref(0);
      // onMounted(() => {
      //   window.onscroll = () => {
      //     const scrollTop = document.documentElement.scrollTop;
      //     y.value = scrollTop;
      //   };
      // });
      // return { y };

      //vueUse
      const {
        y
      } = useWindowScroll()
      return {
        y
      }
    },
  };

</script>

<style scoped lang='less'>
  .top-header-sticky {
    width: 100%;
    height: 80px;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 9999;
    background-color: #fff;
    border-bottom: 1px solid #e4e4e4;
    transform: translateY(-100%);
    opacity: 0;

    &.show {
      transition: all 0.3s linear;
      transform: none;
      opacity: 1;
    }

    .container {
      display: flex;
      align-items: center;
    }

    .logo {
      width: 200px;
      height: 80px;
      background: url(~assets/images/logo.png) no-repeat right 2px;
      background-size: 160px auto;
    }

    .right {
      width: 220px;
      display: flex;
      text-align: center;
      padding-left: 40px;
      border-left: 2px solid @xtxColor;

      a {
        width: 38px;
        margin-right: 40px;
        font-size: 16px;
        line-height: 1;

        &:hover {
          color: @xtxColor;
        }
      }
    }
  }

</style>
